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题名: Cytological studies on the genus Holcoglossum (Orchidaceae)
作者: Jin, Xiao-Hua; Zhang, Ting; Gu, Zhi-Jian; null(李德铢)
刊名: BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
关键词: biogeography ; chromosome stasis ; Hengduan Mountains ; karyotypes ; tetraploid
英文摘要: The karyotypes of ten species of Holcoglossum (Orchidaceae), a highly endangered and diversified genus from China, were investigated to study the infrageneric relationships, biogeography, and speciation patterns in the Hengduan Mountains. The karyotype formulae of the studied species are as follows: 2n = 38 = 20m + 18sm in H. subulifolium, 2n = 38 = 22m + 16sm in H. amesianum, 2n = 38 = 26m + 12sm (6 SAT) in H. lingulatum, 2n = 38 = 26m + 12sm in H. wangii, 2n = 38 = 10m + 28sm in H. kimballianum, 2n = 38 = 14m + 22sm + 2st in H. flavescens, 2n = 38 = 24m + 12sm + 2st in H. rupestre, 2n = 38 = 14m + 20sm + 4st in H. sinicum, 2n = 38 = 16m + 14sm + 8st in H. weixiense, and 2n = 76 in H. tsii. The karyotypes of two tropical species, H. amesianum and H. subulifolium, are the most primitive in the genus, whereas those of four temperate alpine species, H. sinicum, H. rupestre, H. weixiense, and H. flavescens, are more advanced. H. tsii is a tetraploid and H. rupestre may be one of its ancestors. The low frequency of polyploidy in Holcoglossum in the Hengduan Mountains region supports the conclusion that chromosome stasis during rapid speciation is common there. (C) 2007 The Linnean Society of London.
出版日期: 2007-06-01
卷号: 154, 期号:2, 页码:283-288
语种: 英语
收录类别: SCI
学科分类: Plant Sciences
ISSN号: 0024-4074
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/2759
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Peoples R China
2.Chinese Acad Sci, Herbarium PE, Inst Bot, Beijing 100093, Peoples R China

Recommended Citation:
Jin, XH; Zhang, T; Gu, ZJ; Li, DZ.Cytological studies on the genus Holcoglossum (Orchidaceae),BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,2007,154(2):283-288
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